Station is operated in cooperation with the U.S. Environmental Protection Agency .
| Most Recent Instantaneous Value Jan 4 | Min (2009) | 25th percen- tile | Median | Mean | 75th percen- tile | Max (2006) |
|---|---|---|---|---|---|---|
| -- unavailable -- | 590 | 980 | 1310 | 1660 | 1930 | 4550 |